package com.xiatao.demo;
 
import org.springframework.stereotype.Component;

import javax.security.auth.message.callback.PrivateKeyCallback.Request;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
 
/**
 * @auther :
 * @description :
 * @email : 
 * @date : 2019-01-07
 * @version:处理跨域问题
 */
 
@Component
public class HttpHeaderFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
 
    }
 
    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
//    	 HttpServletResponse response = (HttpServletResponse) res;
    	 
//    	String name=req.getParameter("entity");
         HttpServletRequest reqs = (HttpServletRequest) req;
//         System.out.println(reqs.getAttribute("entity"));
    	//设置跨域
        HttpServletResponse response = (HttpServletResponse) res;
//        System.out.println(reqs.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Origin", reqs.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "*");
        //System.out.println("*********************************过滤器被使用**************************");
        chain.doFilter(req, res);
    }
 
    @Override
    public void destroy() {
 
    }
}